<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>圆角常用案例</title>
    <style>
        .box1{
            width: 200px;
            height: 200px;
            background-color: pink;
            border-radius: 50%;
        }
        .box2{
            width: 200px;
            height: 80px;
            background-color: pink;
            border-radius: 40px;
        }
        .box3{
            width: 200px;
            height: 200px;
            background-color: pink;
        }
    </style>
</head>
<body>
    
    <div class="box1">box1</div>
    <br>
    <div class="box2">box2</div>
    <br>
    <div class="box3">box3</div>
</body>
</html>